materialNetworkInterface.h

//
// Copyright 2021 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
//
#ifndef PXR_IMAGING_HD_MATERIAL_NETWORK_INTERFACE_H
#define PXR_IMAGING_HD_MATERIAL_NETWORK_INTERFACE_H
 
#include "pxr/pxr.h"
#include "pxr/usd/sdf/path.h"
#include "pxr/base/vt/value.h"
#include "pxr/base/tf/smallVector.h"
#include "pxr/base/tf/token.h"
 
PXR_NAMESPACE_OPEN_SCOPE
 
class HdMaterialNetworkInterface
{
public:
    virtual ~HdMaterialNetworkInterface() = default;
 
    virtual SdfPath GetMaterialPrimPath() const = 0;
 
    virtual std::string GetModelAssetName() const = 0;
 
    virtual TfTokenVector GetNodeNames() const  = 0;
    virtual TfToken GetNodeType(const TfToken &nodeName) const = 0;
 
    virtual TfTokenVector
    GetNodeTypeInfoKeys(const TfToken& nodeName) const = 0;
    virtual VtValue
    GetNodeTypeInfoValue(const TfToken& nodeName, const TfToken& key) const = 0;
 
    virtual TfTokenVector GetAuthoredNodeParameterNames(
        const TfToken &nodeName) const = 0;
    
    virtual VtValue GetNodeParameterValue(
        const TfToken &nodeName,
        const TfToken &paramName) const = 0;
    
    struct NodeParamData
    {
        VtValue value;
        TfToken colorSpace;
    };
 
    virtual NodeParamData GetNodeParameterData(
        const TfToken &nodeName,
        const TfToken &paramName) const = 0;
 
    virtual TfTokenVector GetNodeInputConnectionNames(
        const TfToken &nodeName) const = 0;
 
    struct InputConnection
    {
        TfToken upstreamNodeName;
        TfToken upstreamOutputName;
    };
    using InputConnectionVector = TfSmallVector<InputConnection, 4>;
 
    virtual InputConnectionVector GetNodeInputConnection(
        const TfToken &nodeName,
        const TfToken &inputName) const = 0;
 
    virtual void DeleteNode(const TfToken &nodeName) = 0;
 
    virtual void SetNodeType(
        const TfToken &nodeName,
        const TfToken &nodeType) = 0;
 
    virtual void SetNodeParameterValue(
        const TfToken &nodeName,
        const TfToken &paramName,
        const VtValue &value) = 0;
    
    virtual void SetNodeParameterData(
        const TfToken &nodeName,
        const TfToken &paramName,
        const NodeParamData &paramData) = 0;
 
    virtual void DeleteNodeParameter(
        const TfToken &nodeName,
        const TfToken &paramName) = 0;
 
    virtual void SetNodeInputConnection(
        const TfToken &nodeName,
        const TfToken &inputName,
        const InputConnectionVector &connections) = 0;
 
    virtual void DeleteNodeInputConnection(
        const TfToken &nodeName,
        const TfToken &inputName) = 0;
 
    virtual TfTokenVector GetTerminalNames() const = 0;
 
    using InputConnectionResult = std::pair<bool, InputConnection>;
    virtual InputConnectionResult GetTerminalConnection(
        const TfToken &terminalName) const = 0;
 
    virtual void DeleteTerminal(
        const TfToken &terminalName) = 0;
 
    virtual void SetTerminalConnection(
        const TfToken &terminalName,
        const InputConnection &connection) = 0;
};
 
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif // PXR_IMAGING_HD_MATERIAL_NETWORK_INTERFACE_H